[thirdparty/u-boot.git] / drivers / gpio / msm_gpio.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Qualcomm GPIO driver
 *
 * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <asm/gpio.h>
#include <asm/io.h>

DECLARE_GLOBAL_DATA_PTR;

/* Register offsets */
#define GPIO_CONFIG_OFF(no)         ((no) * 0x1000)
#define GPIO_IN_OUT_OFF(no)         ((no) * 0x1000 + 0x4)

/* OE */
#define GPIO_OE_DISABLE  (0x0 << 9)
#define GPIO_OE_ENABLE   (0x1 << 9)
#define GPIO_OE_MASK     (0x1 << 9)

/* GPIO_IN_OUT register shifts. */
#define GPIO_IN          0
#define GPIO_OUT         1

struct msm_gpio_bank {
	phys_addr_t base;
};

static int msm_gpio_direction_input(struct udevice *dev, unsigned int gpio)
{
	struct msm_gpio_bank *priv = dev_get_priv(dev);
	phys_addr_t reg = priv->base + GPIO_CONFIG_OFF(gpio);

	/* Disable OE bit */
	clrsetbits_le32(reg, GPIO_OE_MASK, GPIO_OE_DISABLE);

	return 0;
}

static int msm_gpio_set_value(struct udevice *dev, unsigned gpio, int value)
{
	struct msm_gpio_bank *priv = dev_get_priv(dev);

	value = !!value;
	/* set value */
	writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_OFF(gpio));

	return 0;
}

static int msm_gpio_direction_output(struct udevice *dev, unsigned gpio,
				     int value)
{
	struct msm_gpio_bank *priv = dev_get_priv(dev);
	phys_addr_t reg = priv->base + GPIO_CONFIG_OFF(gpio);

	value = !!value;
	/* set value */
	writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_OFF(gpio));
	/* switch direction */
	clrsetbits_le32(reg, GPIO_OE_MASK, GPIO_OE_ENABLE);

	return 0;
}

static int msm_gpio_get_value(struct udevice *dev, unsigned gpio)
{
	struct msm_gpio_bank *priv = dev_get_priv(dev);

	return !!(readl(priv->base + GPIO_IN_OUT_OFF(gpio)) >> GPIO_IN);
}

static int msm_gpio_get_function(struct udevice *dev, unsigned offset)
{
	struct msm_gpio_bank *priv = dev_get_priv(dev);

	if (readl(priv->base + GPIO_CONFIG_OFF(offset)) & GPIO_OE_ENABLE)
		return GPIOF_OUTPUT;

	return GPIOF_INPUT;
}

static const struct dm_gpio_ops gpio_msm_ops = {
	.direction_input	= msm_gpio_direction_input,
	.direction_output	= msm_gpio_direction_output,
	.get_value		= msm_gpio_get_value,
	.set_value		= msm_gpio_set_value,
	.get_function		= msm_gpio_get_function,
};

static int msm_gpio_probe(struct udevice *dev)
{
	struct msm_gpio_bank *priv = dev_get_priv(dev);

	priv->base = devfdt_get_addr(dev);

	return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0;
}

static int msm_gpio_ofdata_to_platdata(struct udevice *dev)
{
	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);

	uc_priv->gpio_count = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
					     "gpio-count", 0);
	uc_priv->bank_name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
					 "gpio-bank-name", NULL);
	if (uc_priv->bank_name == NULL)
		uc_priv->bank_name = "soc";

	return 0;
}

static const struct udevice_id msm_gpio_ids[] = {
	{ .compatible = "qcom,msm8916-pinctrl" },
	{ .compatible = "qcom,apq8016-pinctrl" },
	{ }
};

U_BOOT_DRIVER(gpio_msm) = {
	.name	= "gpio_msm",
	.id	= UCLASS_GPIO,
	.of_match = msm_gpio_ids,
	.ofdata_to_platdata = msm_gpio_ofdata_to_platdata,
	.probe	= msm_gpio_probe,
	.ops	= &gpio_msm_ops,
	.priv_auto_alloc_size = sizeof(struct msm_gpio_bank),
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
81a87e18 MK	2	/*
	3	* Qualcomm GPIO driver
	4	*
	5	* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
81a87e18 MK	6	*/
	7
	8	#include <common.h>
	9	#include <dm.h>
	10	#include <errno.h>
	11	#include <asm/gpio.h>
	12	#include <asm/io.h>
	13
	14	DECLARE_GLOBAL_DATA_PTR;
	15
	16	/* Register offsets */
	17	#define GPIO_CONFIG_OFF(no) ((no) * 0x1000)
	18	#define GPIO_IN_OUT_OFF(no) ((no) * 0x1000 + 0x4)
	19
	20	/* OE */
	21	#define GPIO_OE_DISABLE (0x0 << 9)
	22	#define GPIO_OE_ENABLE (0x1 << 9)
	23	#define GPIO_OE_MASK (0x1 << 9)
	24
	25	/* GPIO_IN_OUT register shifts. */
	26	#define GPIO_IN 0
	27	#define GPIO_OUT 1
	28
	29	struct msm_gpio_bank {
	30	phys_addr_t base;
	31	};
	32
	33	static int msm_gpio_direction_input(struct udevice *dev, unsigned int gpio)
	34	{
	35	struct msm_gpio_bank *priv = dev_get_priv(dev);
	36	phys_addr_t reg = priv->base + GPIO_CONFIG_OFF(gpio);
	37
	38	/* Disable OE bit */
	39	clrsetbits_le32(reg, GPIO_OE_MASK, GPIO_OE_DISABLE);
	40
	41	return 0;
	42	}
	43
	44	static int msm_gpio_set_value(struct udevice *dev, unsigned gpio, int value)
	45	{
	46	struct msm_gpio_bank *priv = dev_get_priv(dev);
	47
	48	value = !!value;
	49	/* set value */
	50	writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_OFF(gpio));
	51
	52	return 0;
	53	}
	54
	55	static int msm_gpio_direction_output(struct udevice *dev, unsigned gpio,
	56	int value)
	57	{
	58	struct msm_gpio_bank *priv = dev_get_priv(dev);
	59	phys_addr_t reg = priv->base + GPIO_CONFIG_OFF(gpio);
	60
	61	value = !!value;
	62	/* set value */
	63	writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_OFF(gpio));
	64	/* switch direction */
	65	clrsetbits_le32(reg, GPIO_OE_MASK, GPIO_OE_ENABLE);
	66
	67	return 0;
	68	}
	69
70	static int msm_gpio_get_value(struct udevice *dev, unsigned gpio)
71	{
72	struct msm_gpio_bank *priv = dev_get_priv(dev);
73
74	return !!(readl(priv->base + GPIO_IN_OUT_OFF(gpio)) >> GPIO_IN);
75	}
76
77	static int msm_gpio_get_function(struct udevice *dev, unsigned offset)
78	{
79	struct msm_gpio_bank *priv = dev_get_priv(dev);
80
81	if (readl(priv->base + GPIO_CONFIG_OFF(offset)) & GPIO_OE_ENABLE)
82	return GPIOF_OUTPUT;
83
84	return GPIOF_INPUT;
85	}
86
87	static const struct dm_gpio_ops gpio_msm_ops = {
88	.direction_input = msm_gpio_direction_input,
89	.direction_output = msm_gpio_direction_output,
90	.get_value = msm_gpio_get_value,
91	.set_value = msm_gpio_set_value,
92	.get_function = msm_gpio_get_function,
93	};
94
95	static int msm_gpio_probe(struct udevice *dev)
96	{
97	struct msm_gpio_bank *priv = dev_get_priv(dev);
98
a821c4af	99	priv->base = devfdt_get_addr(dev);
81a87e18 MK	100
	101	return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0;
	102	}
	103
	104	static int msm_gpio_ofdata_to_platdata(struct udevice *dev)
	105	{
	106	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
	107
e160f7d4	108	uc_priv->gpio_count = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
81a87e18	109	"gpio-count", 0);
e160f7d4	110	uc_priv->bank_name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
81a87e18 MK	111	"gpio-bank-name", NULL);
	112	if (uc_priv->bank_name == NULL)
	113	uc_priv->bank_name = "soc";
	114
	115	return 0;
	116	}
	117
	118	static const struct udevice_id msm_gpio_ids[] = {
	119	{ .compatible = "qcom,msm8916-pinctrl" },
	120	{ .compatible = "qcom,apq8016-pinctrl" },
	121	{ }
	122	};
	123
	124	U_BOOT_DRIVER(gpio_msm) = {
	125	.name = "gpio_msm",
	126	.id = UCLASS_GPIO,
	127	.of_match = msm_gpio_ids,
	128	.ofdata_to_platdata = msm_gpio_ofdata_to_platdata,
	129	.probe = msm_gpio_probe,
	130	.ops = &gpio_msm_ops,
	131	.priv_auto_alloc_size = sizeof(struct msm_gpio_bank),
	132	};